Plot hole: At the end, when Vala and Mitchell activate the Stargate home, SG-1 is delayed in being able to step through because they are detained. However, the whole time they're detained by the gate, there's no radio transmission from SGC. Later we find out they're coming home early, so on SGC's side, they just had an unscheduled off world activation and would know it's from the planet SG-1 is on, and they would radio for an update. None of that was done so the conversation could happen.
Stargate SG-1 (1997)
1 plot hole in Bad Guys
Revelations - S5-E22
Revealing mistake: Just before Teal'c and O'Neill get to the engine room door, Carter can be seen hiding around the corner. (00:27:40)
Aris Boch: Doctor Jackson, if you don't mind treating my wound.
Daniel Jackson: I'm an archaeologist.
Aris Boch: I know. But you're also a doctor.
Daniel Jackson: Of archaeology.
Aris Boch: Never mind. Captain, you must have some medical training.
Samantha Carter: Actually, I'm a major now.
Aris Boch: Oh, well, how very important. I'll inform the galaxy.
Trivia: Some of Stargate's permanent cast and most of its guest stars have appeared on The Outer Limits.
Question: How long was Vala Mal Doran a host to Qetesh?
Chosen answer: It's never actually mentioned on the show, though in the 'Continuum' universe, she says she's been with Ba'al for 50 years.
MoonFaery ★